More precisely recognize ObjC method declarations.

Otherwise, +/- and the beginning of constants can be recognized
incorrectly.

Before:  #define A - 1
After:   #define A -1

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@177725 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Format/TokenAnnotator.cpp b/lib/Format/TokenAnnotator.cpp
index 3578162..7e3ef75 100644
--- a/lib/Format/TokenAnnotator.cpp
+++ b/lib/Format/TokenAnnotator.cpp
@@ -313,9 +313,11 @@
     switch (Tok->FormatTok.Tok.getKind()) {
     case tok::plus:
     case tok::minus:
-      // At the start of the line, +/- specific ObjectiveC method
-      // declarations.
-      if (Tok->Parent == NULL)
+      // At the start of the line, +/- specify ObjectiveC method declarations.
+      if (Tok->Children.empty() || Tok->Children[0].Children.empty())
+        break; // Can't be an ObjectiveC method declaration.
+      if (Tok->Parent == NULL && (Tok->Children[0].is(tok::l_paren) ||
+                                  Tok->Children[0].Children[0].is(tok::colon)))
         Tok->Type = TT_ObjCMethodSpecifier;
       break;
     case tok::colon: